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Michael Bang micvbang

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@craigmurray1120
craigmurray1120 / rest-api-code-generator-list.md
Last active November 18, 2022 09:54
List of REST API code generator
@mugifly
mugifly / docker-clean.sh
Created August 18, 2016 07:17
Cleanup Script for Docker Images and Containers
#!/bin/sh
echo -e "-- Removing exited containers --\n"
docker ps --all --quiet --filter="status=exited" | xargs --no-run-if-empty docker rm --volumes
echo -e "\n\n-- Removing untagged images --\n"
docker rmi --force $(docker images | awk '/^<none>/ { print $3 }')
echo -e "\n\n-- Removing volume directories --\n"
docker volume rm $(docker volume ls --quiet --filter="dangling=true")
@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active March 14, 2026 17:03
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
@jboner
jboner / latency.txt
Last active March 21, 2026 15:20
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD